BMW has introduced new test stands for noise measurements on passenger cars and motorcycles.Information is given on room conditions, machinery equipment, sound levels, frequency ranges and types of measurement.The semi-anechoic room is designed for measuring the sound distribution emitted by a single vehicle. Road influence is simulated by a reflecting floor and a roller-dynamometer.The free field sound distribution in terms of distance and direction is measured in the anechoic room. This room has high-precision installations for sound source identification and noise mapping.The reverberation room serves to measure sound power emitted by the test object. Its second purpose is to subject the bodywork to a high-power external sound source and to measure the sound-deadening effect of the passenger compartment.In conclusion, the presentation provides reports on the initial experience with these test facilities.


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    Titel :

    New Acoustic Test Facilities of BMW


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Ulrich, Albert (Autor:in) / Herzum, Norbert (Autor:in) / Eilker, Rudolf (Autor:in) / Keiner, Wolfgang (Autor:in)

    Kongress:

    SAE Surface Vehicle Noise and Vibration Conference ; 1985



    Erscheinungsdatum :

    1985-05-15




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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